Warp knitting apparatus



April 5, 1960 NEWMAN 2,931,197

WARP KNITTING APPARATUS Filed Aug. 9, 1955 e Sheets-Shae 1 INVENTOR. 4 5MILT N NEYYMHN By XWM HTTORIl/EV April 5, 1960 Filed Aug. 9, 195s M.NEWMAN WARP KNITTING APPARATUS 6 Sheets-Sheet 2 INVENTOR.

MILTON HEWMHN XWM H TTOEWEV April 5, 1960 Filed Aug. 9, 1955 M. NEWMAN.23 3 2'7 28 2.5 .9/ g? e 65 22 f5 63 7 i M 4g 67 P I] I9 6 Sheets-Sheet3 77 I I 4-- n, 79 I I INVENTOR.

MILTON NE WM ATTORNEY April 5, 1960 M. NEWMAN 2,931,197

WARP KNITTING APPARATUS Filed Aug. 9, 1955 6 Sheets-Sheet 4 iuiu l ml:

\v/I/ IIIIIIIIIII g INVENTOR. L N HEWMHN HTTOPIUEV April 5, 1960 M.NEWMAN 2,931,197

WARP KNITTING APPARATUS Filed Aug. 9, 1955 6 Sheets-Sheet 5 IFRONT OFTRICK BAR 7 2 1g. J4.

YARN sums LEVEL YARN GUIDE LEVEL v A v 1% 8 6 7' '7 l\ TRICK BAR LEVELTRICK am LEVEL:

5 4 fly- I YARN euloe LEVEL muck BAR LEVEL A YARN GUlDE LEVEL mm HTTORNEY April 5, 1960 M. NEWMAN 2,931,197

WARP KNITTING APPARATUS Filed Aug. 9, 1955 6 Sheets-Sheet 6 E. g 66 7,.I; G8

IN VEN TOR.

United tes Patent "WARP KNITTING APPARATUS Milton Newman, Ventn'or, NJ.Application August 9, 1955, Serial No. 527,378

7- Claims. v(Cl; 66-84) This invention relates generally to warpknitting machines that'are equipped with loop forming members and moreparticularly to mechanism for monitoring the loop forming members.

A principal object of the present invention is to provide such a machinewith improved means for monitoring the loop forming members whereby'theeffort and time required for a change over from one mode of operation toa different mode of operation is reduced to a minimum.

Another principal object of the present invention is to provide suchamachine whereina change from one mode of operation to aiselecteddifferent mode of operation is effected solely .by suitably rearrangingthe component parts of the meansfor monitoring the loopformingmem-.bers.

And still anotherprincipal object of the present inventionis to providesuch a machine wherein the means for monitoring the loop forming memberscomprises articulated endless link chain means trained over revolublemeans and operative to determine the pattern of movement of the loopforming members so thatat any instant during the operating cycle of themachine the loop forming members will be in a predetermined position.

Another important object of the present invention is to provide such amachine wherein the monitor chains that determine the pattern ofmovement of the loop forming members may be readily replaced with othermonitor chains arranged to afiord aselected different pattern ofmovement.

And another important object .of the present invention is to providesuch a machine wherein the loop forming members intermittently areshifted in a direction weftwise of theiwork as the'work progresses andthe arrangement of the loop forming members is such that shifting of theloop forming members in the manner aforesaid effects a predeterminedpattern in the finished work.

Other objects and advantages of the present invention will appear morefully hereinafter, it being understood that the invention consistssubstantially in the combination, construction, location and relativearrangement of parts, all as described in detail hereinafter, as shownin the accompanying drawings and as finally pointed out in the appendedclaims.

In the accompanying drawings:

Figure 1 is an elevation of one end of a Warp knitting machineconstructed in accordance with and embodying the general principles ofthe present invention;

FigureZ is an elevation of the opposite end;

Figure 3 is an elevation of the front of the machine,

.as indicated by line 33 in Figure 1;

Figure 4 is an enlarged vertical sectionon line 4-4 of Figure 3;

Figure 5 is an enlarged vertical section on line 5-5 of Figure 3;

Figure 6 is an enlarged fragmentaryfront'view;

Figure 7 is a verticalsection on line 7-7 of Figure 5;

Figure 8 is an enlarged vertical sectionfion line 8-8 of Figure/7.;

Figure 9 is 'a fragmentary front view showing a modification of the formof the machine shown in Figures 1 through 8;

Figure 10 is a fragmentary elevation of one end of the modified form ofthe machine, as indicated by line 10-10 of Figure 9;

Figure 11 is an enlarged'verti'cal section on line 11--11 of Figure 9;

Figure 12 is afragmentary'section online12-12 of Figure 11;

detail of the machine shown in Figures 16 and 17;

Figure 19 is an enlarged side elevational view of the detail showninvFigure l8; and

Figure 20 is a diagramamtic view illustrating an operating cycle of themachine shown in Figures 16 to :19.

Referring particularly to Figures 1 through 8, a warp knitting machineconstructed-in accordance with and .embodying the principles of thepresent invention comprises a rigid frame structure including a pair offloor supported frame sections 10 and 11 that are located respectivelyat oppositeends of the machine and a pair of members 12 and .13 thatextend horizontally respectively ,across thefront and rear of themachine and interconnect the frame sections .10 and 11 at asuitableheight above the floor and maintain the same upright.

Extending horizontally lengthwise of the rn'achine'and located in avertical plane is a trick bar 14 the opposite ends of which are suitablysupported respectively upon the end frames 10 and 11. Immediately to therear of and extending parallel to the trick bar 14 is a needle bar 15that carries a row of upright latch needles 16 and is mounted on a 2 bar17. Depending respectively from opposite end portions of the 2 bar 17are a pair of guide bars 18l8 that are slidably mounted each in a fixedguide 19 which is carried by the associated end section of the framestructure, and depending from each guide 18 is a cam follower bar 20.The lower end portion of the latter is provided with a longitudinallyextending slot 21 through which projects a main drive shaft 22 thatextends horizontally lengthwise of the machine. Mounted upon each end ofthe drive shaft 22 is a cam means 23 which :in the operation of themachine actuates a pair of rollers 24-24 mounted upon the bar 20, inconsequence of which rotation of the main drive shaft 22 is prising thebar 20, guide 18, 2 bar 17, needle bar.15 and latch needles v16.

immediately above and extending horizontally parallel to the trick bar14 .is a pillar bar 25 that carriesia row of depending pile yarn guidingfingers 26 and which is mounted upon an angle bar 27, and immediately infront of the pillar bar 25 is a second horizontally extending pillar bar28 that carries a row of depending Warp thread guiding fingers 29 andwhich is mounted upon an angle bar 30. The angle bars 27 and 35B areeach provided with intermediate slide bars 31 and end brackets 32 whichare slidably connected to suitable extensions 33 and 34' respectively ofthe brackets '33 and 34 fixedly mountedupon a shaft 35extendinghorizontally length wise of the machine with opposite endportions thereof journalled in the opposite end sections of the framestructure. One end portion of the shaft 35 is provided with a laterallyextending arm 36 that is connected by a depending link 37 and a pivotedarm 38 to an upright cam follower bar 39. The latter is provided with alongitudinally extending slot 40 through which projects the main driveshaft 22. On the latter is mounted cam means 41, which, in the operationof the machine, actuates a pair of rollers 42-42 mounted upon the bar39, in consequence of which rotation of the main drive shaft 22 istranslated into vertical reciprocation of the bar 39 and, through thepivoted arm 38 and link 37, into rocking motion of the assemblycomprising the arm 36, shaft 35, brackets 33 and 34, angle bars 27 and30, pillar bars 25 and 28, and fingers 26 and 29.

Operatively connected to one end of each of the warp thread and pileyarn pillar bars 28 and 25 by a rod 43 is an upright cam follower bar44, which is pivotally secured at its lower end to a pivot shaft 45mounted in position by a pair of end supporting brackets 45-45'. Thebars 44-44 mount rollers 45"-45 that respectively engage a pair of cams46-46 mounted upon a shaft 47 which extends horizontally across the endof the machine. The shaft 47 is revolubly mounted upon a pair ofbearings 47-47 respectively mounted upon fixed supports 48-49, whichlatter also support the brackets 45-45 for the pivot shaft 45, andmounts a bevel gear 50 that meshes with a bevel pinion 51 mounted on theupper end of a vertically extending shaft 52 revolubly mounted in abearing 52' suitably carried by the support 49 or other fixed structureof the machine. The lower end of the shaft 52 mounts a beveled pinion 53that meshes with a bevel gear 54 that is mounted upon a shaft 55 whichextends horizontally across the end of the machine. The shaft 55 isrevolubly mounted upon a pair of brackets 56-56 and mounts a beveledgear 57 that meshes with a beveled pinion 58 on the end of the maindrive shaft 22. At the opposite end of the machine the pillar bars 25and 28 are operatively connected, respectively by a pair of tensionsprings 59-59, to an arm 59 depending from the shaft 35, while at thecontrol end of the machine said pillar bars 25 and 28 are respectivelyoperatively connected to the upper ends of the cam follower bars 44-44by the rods 43-43. Thus, the tension springs 59-59, through theintervention of the angle bars 27 and 30, which carry the pillar bars 25and 28, tend constantly to bias the rollers 45"-4S" into operativeengagement respectively with the cams 46-46. In the operation of the'machine, the cams 46-46 mounted on the shaft 47 are actuated by themain drive shaft 22 through the system of shafts and gears justdescribed, in consequence of which rotation of the main drive shaft 22is translated into rocking motion of the cam follower bars 44-44 and,through the rods 43-43, into reciprocable movement of the assemblycomprising the angle bar 27, pillar bar 25 and fingers 26, and of theassembly comprising the angle bar 30, pillar bar 28 and fingers 29.

In lieu of the cams 46-46 above described for effecting weft-wiseshifting of the pillar bars 25 and 28, it will be understood, of course,that monitor chains, similar to that hereinafter described for effectingleft-wise shifting of the pick bar 66 may be employed, these chainsbeing trained about toothed monitor wheels, which are respectively keyedto and driven by the shaft 47. The monitor chains thus employed forweft-wise shifting of the pillar bars 25 and 28 may each comprise adifferent set of chain links, each set including links of desired depth,so that each of the pillar bars 25 and 28 may be individually shifted togreater or less extent as may be required for the production of aparticular type or design of fabric. Of course, the monitor chains thusemployed in lieu of cams 46-46 will be in such'phase rela- 4 tion as toinsure proper synchronized operation of the pillar bars 25 and 28. 7

Immediately in front of and extending parallel to the trick bar 14 is apick bar 60 that carries a row of upright picks 61 and which is mountedupon an angle bar 62. A short distance in front of the pick bar 68 andthe angle bar 62 and extending parallel thereto is a rigid bar 63 towhich bar the angle bar 62 is rigidly secured, as by plates 64 andclamps 65. The bar 63 is part of a movable assembly 66 disposed in avertical plane and extending lengthwise of the machine, which assemblyadditionally comprises laterally spaced members 67 that depend from thebar 63 and a bar 68 which extends through corresponding lower endportions of the members 67, parallel to the bar 63. The lowerextremities of the members 67 are connected by axially alined pivots 69to corresponding ends of bar links, designated 70, from which pivots thebar links extend rearwardly across the machine, the rear ends thereofbeing connected by axially alined pivots (designated 71) to brackets(designated 72) that are carried by member 13 of the rigid framestructure of the machine. Likewise, extending rearwardly from'theassembly 66 and biasing the assembly together with the angle bar 62, thepick bar 60 and the picks 61 toward the trick bar 14 are tension springs73. The weight of the assembly is supported in the manner now to bedescribed.

A pair of rollers 74-74 are mounted intermediate the ends of certain ofthe bar links 70 for rotation about a common axis that extendshorizontally lengthwise of the machine. The undersides of the rollers74-74 respectively engage the outer peripheries of a pair of articulatedendless link chains 75-75. These chains are respectively trained looselyover a pair of revoluble members 76-76 that are mounted upon a shaft 77which extends horizontally lengthwise of the machine, which shaft 77 isrevolubly journalled in a pair of bearings 78-78 respectively carried bya pair of members 79-79 that extend horizontally across the machine,between the members 12 and 13 of the rigid frame structure of themachine. At one end of the shaft 77, intermediate the bearing 78 and therevoluble member 76, is mounted a spur gear 80 that meshes with a spurgear 81 which is mounted on the main drive shaft 22. Mounted on one endof the latter is a pulley 82 over which is trained a belt 83 thatextends to and is additionally trained over a pulley 84. The latter ismounted on one end of a shaft 85 that is revolubly journalled in thesection 10 of the rigid frame structure of the machine, and mounted onthe opposite end of the shaft 85 is a pulley 86 over which is trained abelt 87 that extends to and is additionally trained over a pulley 88mounted on a shaft 89 of a floor supported electric motor 98. In theoperation of the machine, rotation of the motor shaft 89 is'translatedinto rotation of the main drive shaft 22 through the system of belts andpulleys just described, and rotation of the main drive shaft 22, istranslated into rotation of the shaft '77 through the gears 80 and 81.The members 76-76 mounted on the shaft 77 rotate with the latter and inturn move the endless link chains 75-75, progressively feeding the samepast the overlying rollers 74-74, which are raised and lowered togetherin accordance with a cycle of operation predetermined by the arrangementof links in the link chains 75-75 as presently to be described. As aresult, the bar links 70 swing vertically about the pivots 71 andcorrespondingly raise and lower the assembly comprising the frame 66 andangle bar 62, the pick bar 60 and the picks 61.

Immediately to the rear of the bar 63 of the rigid frame 66 are uprightarms 91 that extend respectively across longitudinally spaced portionsof the bar 63 in sliding contact therewith. The lower ends of the arms91 are secured to'a rigid bar 92 thatpis part of a movable assembly 93disposed in a vertical plane and extending lengththe rollers 96-96,

vand the picks 61 is biased :tain operations of the machine.

'tion of the link side abuts ;prises laterally spaced members 94 thatdependfrom the bar 92 and a bar 95, which extends through correspond inglower end portions of the member 94, parallel to the bar 92. The lowerextremities of the members 94 are pivotally connected to the main driveshaft 22, in consequence of which the latter supports the weight of theassembly 93.

A pair of rollers 96-96 are mounted intermediate the ends of certain ofthe members 94 for rotation about a common axis that extendshorizontally lengthwise of the machine. The rear sides of the rollers96-96 respectively engage the outer peripheries of a second pair ofarticulated endless link chains 97-97 that likewise are respectivelytrained loosely over the revoluble members 76-76. As the latter rotate,they in turn move the endless link chains 97-97, progressively feedingthe same past which are moved fore and aft of the machine together in apredetermined manner. As ;a result, the assembly comprising the frame 93and the upright arms 91 swings fore and aft about the main drive shaft22. As already stated, the assembly including the frame 66 and the anglebar 62, the pick bar 69 toward the trick bar 14 by the tension springs73. It will now be apparent that the position of the assembly fore andaft of the machine is controlled by the position of the upright arms 91,the movements of which are followed by the bar 63 of the frame 66. Eachrevoluble member 76 with its complernent of link chain 75 and link chain97 constitutes .a monitor, generally designated 98, for controlling cer-This monitor 98 will now be described in detail.

The revoluble member 76 is provided with a set of three external annularflanges 99 that are axially spaced equally and which are separated by apair of deep annular chain accommodating grooves 166-1430.Circumferentially spaced equally about each flange 99 are a set of eightV-shaped notches 101 that open upon the outer peripheral edge of theflange and which extend inwardly to the base Walls of the grooves,designated 102, dividing the flange into a corresponding number ofarcuate sections 103. Projecting radially outwardly from the base Wallof each groove Hit) and each extending across the groove between a pairof opposed arcuate flange sections 193-193 are a set of eightcircumferentially equally spaced teeth 164 of a height corresponding tothe depth of the groove.

In the machine shown, the endless chain '75 comprises 24 linksinterconnected by a corresponding number of pins 105, the opposite endsof which are accommodated in the V-shaped notches 191 formed in the sideflanges of the chain-receiving groove 18! Each link has opposite endrelatively oflfset leading and trailing portions that are disposedrespectively in planes which are parallel to the plane in which thechain travels, being interconnected by an intermediate link portion in aplane normal to the plane of travel aforesaid, each link being thusgenerally of Z shape in longitudinal cross-section, The leading portionof each link side abuts the trailing portion of the next preceding link,with which it is pivotally interconnected by one of the pins E25, andthe trailing porthe leading portion of the next succeeding link, withwhich it is pivotally interconnected by another of the pins 395.immediately in advance of the intermediate link portion aforesaid is anotch 106 that opens upon the inner peripheral edge of the link.

When the chain 75 is operatively mounted upon the revoluble member 76, asection thereol extends over and the remaining section depends looselyfrom the revoluble member 76. The inner marginal link portions of thefirst mentioned chain section are received in one of the grooves betweena pair of the flanges 99, the notches 196 receiving the teeth 194 thatproject outwardly from the the loop is,

thereon turn at .rbasewall 102 ofthegroove=ldd The outer peripheral:edges of the link curve slightly so that the edges aforesaid of thefirst mentioned chain sectionmerge smoothly. It will be observed thatthechains 75-75 each include a plurality of groups of interconnected links,the-grouped links being respectively of predetermined different depthsmeasured radially of their associated drive members .so

that as said diflerent depth links engage the roller 74 it isalternately raised and lowered to correspondingly raise and lower thepick bar 60. Each group of links in the chain is joined to its adjoininggroup of. links by links of graduated depth, so that the transition fromengagement of high depth links with .the'rollers 74 to engage mentthereof by low depth links of the chain is effected smoothly andwithout'any shock to any of the machine partsit will be appreciated, ofcourse, that as the roller 74 is engaged by the low depth links of thechain, the picks 61 are caused to assume their lowermost position,

in which latter position they are inoperative to form loops of the pileyarn 103. Thus, for each orbital revolution of the chain 75 as driven bythe *member 76, the chain links will act uponthe roller 74 toalternately raise and 97-97 are each genermounting to that of the chain74 and accordingly operate to alternately shift the picks 61 away fromand back toward the trick bar 14 to form loops of the pile yarn 1633drawn out from predeterminedly selected stitches of the warpknittedchains thereof formed of the warp thread 107. The depth of of course,determined by the extent of movement of the picks outwardly from thetrick bar 14, which movement is in turn governed by suitable variationsin the depths of the links of the chains 97-97 operating against theirassociated rollers 96-96.

In the operation of the machine, theneedles i6, fingers 26 and 29andpicks 61 may be actuatedina well known manner so that each set thereofforms a chain of stitches in each of a plurality of ends of the warpthread 107 and lays therein the pile yarn 168, the work or end productbeing designated 169. In this connection, the plane of that portion ofthe work last knitted and still engaged with the trick bar 14, i.e., aplane immediately in advance of and parallel to the trick bar, isreferred to hereinafter as the plane of the work. It will be understoodthat the fingers 29 of the warp thread pillar .bar 28 operate inconventional manner to lap the warp threads around the latch needles attimed intervals-to form warp chains of interconnected stitches, and thatthe picks 61 are lapped with pile yarn by the fingers 26 of the pileyarn pillar bar 25 as the warp thread stitches are being formed, thethread of the warp stitches being thus wrapped about the pile yarn asthe latter is laid in the warp-knitted chain. The wrapping of the warpchain stitches about the ends of pile yarn laid therein is effected atthe upper level of the trick bar 14, preliminarily to which the pileyarn has been drawn out of the warp chai to form the desired loops whichconstitute the pile surface of the fabric.

Let it be assumed that the gear 81 on the main drive shaft 22 and thegear 89 on the shaft 77 are identical, in consequence of which the gearratio is '1 to 1 and the shaft 77 and the revoluble members 76-76mounted the same rate as the main drive shaft 22. Since-the members76-76 each have eight teeth 104 and the chains 75-75 each have 24 links,it requires three revolutions of the main drive shaft 22 for onecomplete pass of the chains 75-75 about the members 76- 76. Therefore,the deepest links in the chains 75-75 are presented under the rollers74-74 once for every three revolutions of the main drive shaft 22, thepicks 61 being raised therebyfor engagement with the yarns 198 to formloops therein. In addition, the-needles 16 are actuated once and onestitchis formed in the yarn 7 107 each time the main drive shaft makes acomplete revolution, so that during each operating cycle of the machinethere is formed a repeat of three stitches in the yarn 107 and one loopin the yarn 108.

Let it now be assumed, for example, that it is desired to make a changeover from repeats of the nature just described to repeats of fourinstead of three stitches in the yarn 107 and one loop in the yarn 108.In this event, it is necessary only to replace the chains 75-75 withsimilar chains each having 32 instead of 24 links. Now, it will requirefour instead of three revolutions of the main drive shaft 22 for onecomplete pass of the chains about the members 7 6-76. Therefore, thedeepest links in the chains will be presented under the rollers 74-74once for every four instead of three revolutions of the main drive shaft22 The needles 16 again are actuated once and one stitch is formed inthe yarn 107 each time the main drive shaft 22 makes a completerevolution, so that during each operating cycle of the machine there isnow formed a repeat of four stitches in the yarn 107 and one loop in theyarn 108.

The interaction between the rigid frames 66 and 93 and the chains 97-97controls the fore and aft movement of the picks 61, which movementdetermines the length of the loops formed in the yarn 108. The chains97-97 are the same, as to number of links in a chain, as the chains75-75 and are arranged on the revoluble members 76-76 so that thedeepest links are presented under the rollers 96-96 of the rigid frame93 at approximately the same time that the deepest links of the chains75-75 are presented under the rollers 74-74.

Let it now be assumed, by way of further example, that it is desired tomake repeats of four stitches in the yarn 107 with a short and a longloop in the yarn 108 associated respectively with the second and fourthstitches. In this event, the chains 75-75 are replaced with chainshaving 16 links, and the chains 97-97 are replaced with chains having 32links graduated in depth and arranged with links of minimum depthseparating links of medium and other links of maximum depth. Now it willrequire four revolutions of the main drive shaft 22 for one completepass of the 32-link chains about the members 76-76 and two completepasses of the 16-link chains about the members 76-76. During eachoperating cycle of the machine, therefore, the deepest links in the16-link chains will be presented under the rollers 74-74 twice and thelinks of minimum and links of maximum depth in the 32-link chain will bepresented under the roller 96-96 each only once, in consequence of whichthere will be formed repeats of four stitches in the yarn 107 with ashort and a long loop in the yarn 108 associated respectively with thesecond and fourth stitches.

By utilizing monitor chains properly designed to provide the requisitegroups of different depth links, the loop-forming picks 61 may be madeto follow any pattern of movement desired so that at any instant duringthe operating cycle of the machine they will be in a predeterminedposition, both horizontally fore and aft of the machine and vertically.For example, to provide the work with loops all of which are uncut,reference is made to Figure 13 which diagrammatically illustrates thepath traversed by the upper ends of the picks 61 relatively to fixedplanes of the machines. Thus, assuming that-the picks 61 are in theircompletely raised position for engagement thereof with the pile yarn108, which is properly presented in position for such engagement by theguide fingers 26 of the pile yarn pillar bar 25, under control of themonitor chains 97-97, the picks will move forwardly from the trick bar14 from the position 1 shown in Figure 13 to position 2 thereof, theextent of such forward motion being determined by the depth of theoperative lengths of the monitor chains 97-97 to provide loops of apredetermined length. The picks 61, under control of the monitor chains75-75 are then lowered from position 2, which is above the horizontalguide level, through the point "3 below the upper level of the trickpoint 3, and thus below the level knit chain plane of the pile yarn tothe point 4, which is bar, represented by the at which the loops arebound into the warp stitches.

At the trick bar level, designated by the pick point 3, the picks arestill engaged with the loops and they become disengaged from the loopsas the picks move downwardly from the point 3 to the point 4. In orderto avoid any possibility of entanglement of the picks with the loopsfrom which they have just been disengaged upon return upward movement ofthe picks, the picks are shifted from the point 4 horizontally forwardof the plane of the trick bar to the point 5 under control of themonitor chains 97-97, which latter point is, of course, spaced forwardlyof the ends of the previously formed loops. The picks are then free tomove upwardly and are so moved by the monitor chains 75-75 upwardly tothe point 6 which is above the trick bar level and below the yarn guidelevel, from which point the picks are moved rearwardly toward the planeof the trick bar under control of the monitor chains 97-97 to the point7, from whence the picks are moved upwardly to point 1 under control ofthe monitor chains 75-75 to again engage the pile yarn 108.

Where it is desired to provide the work with a pile all of which is cut,as by cutting all of the loops after they have been pulled out to lengthby the picks 61, the said picks are respectively provided with knifeedges 110 (as see Figure 11), which knife edges are operative to cutthrough the bight ends of the loops in manner well known in the art ofproducing cut pile fabric. However, the cycle of operation for theproduction of such cut fabric is somewhat different from that employedin producing uncut loops, because once the pile loops are out they offerno interference to return upward movement of the picks. Thus, asdiagrammatically shown in Figure 14, for the production of cut pilefabric, the knife edge picks move from their initial position 1horizontally to position 2 to draw the pile yarn into loops of therequisite length, this movement being under the control of the monitorchains 97-97. Thereafter, under control of the monitor chains 75-75 thepicks are lowered from the point 2 to point 3, which is approximatelythe upper level of the trick bar 14, and then, while still under thecontrol of the monitor chains 75-75, the said picks are raised to causetheir knife edges to shear through the bight ends of the loops, thepicks for this purpose being raised to the point 8, from which point thepicks are horizontally shifted back toward the plane of the trick bar tothe point 7 under control of the monitor chains 97-97. Thereupon thepicks are raised vertically under the control of the monitor chains75-75 to present their upper ends into pile yarn engaging position atthe starting point 1 of the cycle of the operation.

in certain instances, it may be desired to produce work having bothlooped and cut pile extending along each given weft-wise course of thework being produced on he machine, for which purpose the pick bar 60 maybe fitted with picks of which only selected ones have knife edges. Forthe production of such work the cycle of operation follows that which isdiagrammatically illustrated in Figure 15, wherein it will be observedthat the picks move outwardly from their initial position 1 to theirposition 2 under control of the monitor chains 97- 597 to provide ioopsof the requisite length, and thence downwardly to position 3 undercontrol of the monitor chains 75-75. In this position 3 all of the picksare stiil in engagement with the yarn and so hold the loops extendedoutwardly from the trick bar. When, however, the picks are movedupwardly from the point 3 to the point 8, still under control of themonitor chains 75-75, the picks, which are fitted with knife edges,shear through the loops engaged therewith to cut the same, followingwhich, while under control of the monitor rchains 75-75, the-picks;.arelowered from the point 8 to the point 4 to thereby disengage thenoncuttingpicks from their loops. Thereafter, the picks are shiftedoutwardly from the point 4 to the point 5 under control of the monitorchains 97-97 so as to clearthe picks from the bight ends of the uncutloops, following which the picks are moved upwardly to point 6 undercontrol of the monitor chains 75-75 and thence horizontally to point 7under control of the monitor chains 97-97. Finally, the picks areshifted vertically from point 7 to point 1 under control of the monitorchains 75-75 for reengagement thereof with the pile yarn.

It will be appreciated that for proper operation of the machine toproduce either loop or cut pile fabric, the monitor chains 75-75 and97-97 operate conjointly sand synchronously, and accordingly, thelinkage arrangement of the monitor chains 75-75 must be property relatedand timed to that of the monitor chains 97-97. Thus, where looped pilefabric is being produced, the

linkage arrangement of the pick raising and lowering -monitor chains75-75 should be such as to hold the 'picks in their fully raisedposition for the full interval of time required for outward shifting ofthe picks to the extent necessary to form loops of predetermined depth,this outward shifting of the picks being effected by the monitor chains97-97. Stated conversely, for the production of uncut looped pilefabric, the linkage arrangement of the monitor chains 97-97 should besuch as to draw the loops out of the yarn 168 to their fullest extentduring the interval that the picks are held in their raised position byoperation of the monitor chains 75-75.

Where cut pile fabric is to be produced, the linkage arrangement of themonitor chains 97-97 is such as to hold the picks in coincidence withthe outer ends of the fully extended loops for the additional periodrequired for cutting of the loops, and thus, for cut loops the monitorchains 5 7-97 will have a greater number of high depth links connectedtogether in a group than would be the case where the loops are not to becut. In other words, for cut pile fabric the high depth links groupedtogether in the monitor chains 97-97 are of sufficient number to holdthe picks 61 at their outermost position for a preselected length ofloop for a period of time sufficient to enable the picks to moveupwardly for cutting of the loops and thence downwardly into theirlowermost position, from which latter position the picks arerectilinearly shifted back against the trick bar. It will beappreciated, of course, that groups of picks 61 having knife edges andgroups of picks devoid of knife edges may be alternately arranged so asto provide the finished work with a corresponding arrangement ofwarp-wise extending stripes or areas respectively of cut and uncutloops.

It will be observed, however, that in making a change from one mode ofoperation to another no change is required in the means for transmittingpower from the .motor 90 to the revoluble members 76-76, i.e., the.shafts 22, 77, 85 and 8% rotate respectively at the same rates of speedregardless of the nature of the repeat desired. In this connection,while, for the sake of simplifying explanation of operation of themachine, the ratio of the gear 81 on the main drive shaft 22 to the gear8% on the shaft 77 is assumed to be 1 to 1, this ratio is not essentialand more commonly is in the order of 1 -to 4.

Likewise, it will be observed that a monitor chain may be removed fromits revoluble member 76 easily and quickly simply by removing one of thepins 165, which quick-detachably secures together a pair of links, andthen lifting the chain from the revoluble member 76, and the chain thusremoved may be replaced by another chain just as easily and quickly byreversing this procedure.

In the form of the warp knitting machine described thusfar, whilethepick mounting bar 64) iscapable of movementvertica'lly up and down andhorizontally fore and aft of the machine, it is incapable of movementhorizontally toward either end of the machine, i.e., weft-wise of thework. However, referring particularly to Figures 9 through 12, amodified constructionis shown wherein the pick mounting baris not onlycapable of movement vertically up and down and horizontally fore and aftof the machine, but additionally is capable of movement horizontallytoward either end of the machine, i.e., weft- Wise of the work.

in this modified form of the machine, the pickmounting bar as and theangle bar 62 are replaced respectively by a pick-mounting bar 111 and aguide bar-1'12. The bottom of the pick bar 111'is slidably receivedbetween the side walls 113-113 of a channel 114 formedin-the top of theguide bar112 and is provided with'elongated slots 115 through each ofwhich there extends a pin 115 the opposite end portions-of which aresecuredrespectively to the opposite side walls 113-113 of the channel114. At one end of the pickmounting barlll is a rod 116 that connectsthe pick -mou nting bar 111 with an upright arm 117 the lower end ofwhich is mountedon the pivot 15. The arm 117 mounts a roller 118 thatengages. the outer periphery of an articulated endless link chain 119which is trained over a revoluble member 12% mounted on the shaft 47. Tothe oppositeend of the pick mounting bar 111 is secured a tension spring121 that is anchored to a member 122 mounted onthe end section 10 of theframe structure. The spring 121 acts to constantly urge the roller 118into engagement with the outer periphery of the chain 119. The chain 119and the revoluble member 12% over which his trained are component partsof a monitor, designated generally by the numeral 123, that isgenerallysimilar to the monitors 98-98 in construction, mounting andoperation. In view of the detailed description of the monitors 93-98already set forth, a detailed description of the monitor 123 is deemedto be unnecessaryfor a full understanding Of the present invention.

In the operation of the machine, the revoluble monitor member 12%rotates with the shaft 47 and in turn moves the monitor chain 119,progressively feeding the same past the roller 118, which is movedlengthwise of the machine in a predetermined manner. As'a result,rotation of the shaft 4-7 is translated into rocking motion of the arm117 and, through the rod 116, into axial shifting movement of the pickmounting bar 111, i.e., movement of the bar 111 in the direction of itslength or weftwise of the work. It will be understood that the guide bar112 is secured .to the underlying plates 64 andthat the pick mountingbar 111, slidably mounted on the guide bar 112, moves relative thereto.In addition, it will" be understood that the rod 116 is secured to thepick mounting bar 111, slidably mounted on the. guide bar 112, movesrelative thereto. In addition, it will be understood that the rod 116 issecured to the pick mounting bar 111 and the arm 117 by universal permitfreedom of movement of the pick mounting bar 111 vertically up and downand horizontally fore and aft of the machine.

Let it be assumed that groups of picks dlhaving knife edges and groupsof picks 61 devoid of knife edges-are arranged alternately on the pickmounting bar 111, the monitor chains -75 and 97-97 are replaced withchains suitably arranged for effecting the pattern of movement'of thepicks 61 necessary for cutting the loops,.de-

scribed hereinbefore, and the monitor chain 119 is. .re-

type connections which links of minimum depth grouped together. Whileeither group of links in passing under the roller 118, the pick mountingbar 111 is held against movement weft-wise of the work, in consequenceof which the machine operates to provide the work with stripes, asbefore. However, at the point in the operation of the machine when onegroup of links passes under the roller 118 and the other moves intoengagement with the roller 118, the pick mounting bar 111 shiftsweft-wise of the work, in consequence of which successive sections 'ofthe stripes are offset relative to one another weft-wise of the work. itwill be appreciated that the chain 119 effects the desired offset all inone movement of the pick mounting bar 111 to furnish the work with apattern of rectangular areas arranged more or less in checker boardfashion, but the chain 119 can be replaced with a chain arranged toeffect the desired offset in successive stages to furnish the work witha pattern of diagonally extending stripes or areas respectively of cutand uncut loops.

It will be understood that instead of utilizing a chain provided withlinks uniform in depth so as to furnish the work with warp-wiseextending stripes or areas respectively of cut and uncut loops, the rod116 and the tension spring 121 may be disconnected from the pickmounting bar 111 and the latter locked against sliding movement relativeto the guide bar 112, as by screws 124.

It will be observed, as in the case of the revoluble members 76-76, inmaking a change from one mode of operation to another no change isrequired in the means for transmitting power from the motor 90 to therevoluble member 120, i.e., the shafts 22, 55, 52 and 47 rotaterespectively at the same rates of speed regardless of the desiredshifting movement of the pick mounting bar 111 weft-wise of the work.

In certain instances it may be desirable to provide the machine of thepresent invention, as shown, for example, in Figure 16, with anadditional pile yarn pillar bar 25 for guiding and delivering additionalends of pile yarn 108 to and about the chain stitch needles 16 and thepick 61. For weft-wise shifting of this auxiliary yarn guiding pillarbar, there is operatively associated therewith a monitor controlconsisting of a monitor chain and drive wheel assembly similar to thatemployed for effecting weft-wise shifting of the pillar bar 25. Byemploying an additional pillar bar as just mentioned, additional ends ofyarn may be directed to the needles of the picks, as desired,-to formdifferent designs. Thus, the additional yarn guiding pillar bar 25 mayshift in exact correspondence with the pillar bar 25 or it may shift inopposite direction with respect to the shifting of the bar 25, theconjoint shifting of the two bars being effected simultaneously or insequence, as determined by the operation of the monitors whichrespectively control the weft-wise shifting of the loop-formingyarn-guiding pillar bars.

It will be understood, of course, that for the production of pilefabrics wherein the warp knitted chain stitches with the pile yarnincorporated therein by the apparatus of the present invention areinterconnected by back weft yarns laid to extend laterally back andforth across parallel warp knitted chains to tie the same together, theapparatus of the present invention may include an additional back weftyarn bar 25 (as see Figure 16), which is operated in conventional mannerto shift longitudinally, that is, weft-wise of the work, in timedrelation to operation of the pillar bars 25, 25 and 28. This additionalbar 25', which is disposed in substantial parallel relation to andrearwardly of the pillar bars 25, 25? and 28, carries a series ofyarn-guiding fingers, similar to the fingers 26 and 2? of the bars 25and 28, for guiding and delivering to the warp-chain-stitch-formingneedles of the machine a plurality of additional ends of back weft yarn.These back weft yarns are laid into the warp chain stitches inconventional manner to provide a back filling for the fabric, whichfilling may be of any forma- 12 tion, such as are shown, for example, inmy prior United States Letters Patent Nos. 2,229,469, of January 21,1941 (see Figures 9, 10 and 11 thereof) and No. 2,435,- 897, of February10, 1948 (Figure 3 thereof).

In certain instances a complete fabric may be produced, that is, afabric wherein the warp knitted chain stitches with the loop-formingyarns incorporated therein are joined together by the machine of thepresent invention even Without the aforementioned additional back weftyarn bar 25 as by following a procedure like that disclosed anddescribed in my prior Patent No. 2,396,525, of March 12, 1946. In thislatter construction, the back filling is formed of the same yarn as thatof which the loops are formed, the yarns in such case being extendedback and forth across two or more adjoining chain stitches throughoutthe fabric, the loops being in such case formed as desired at the pointsof reversal of the back weft yarn.

Figures 16 to 20, inclusive, illustrate a modified construction ofmachine which includes all of the hereinbefore mentioned pillar bars 25,25 25 and 28 and which is particularly characterized by the provisiontherein of means for limited movement of the pick bar toward and awayfrom the trick bar for the production of warpknitted fabric havinguniform depth uncut pile loops throughout. In order to produce a fabrichaving a uniform depth of pile formed of relatively short uncut loopsall of the same length, the monitor chains 97-97 l1ereinbefore describedmay be dispensed with and in place thereof the machine may be providedwith a simple camming mechanism now to be described for effectinglimited in and out motion of the pick bar and of the picks carriedthereby. In the modified arrangement of Figures 16 and 17 the pick baris designated generally by the reference numeral 6% and its associatedpicks by the reference numeral 61*. As in the previously describedmodification, vertical motion of the pick bar 60 is controlled by themonitor chains 75-75 operating on the rollers 74 respectively mounted onthe pivoted bar links 70, which in turn are operatively connected to thepick bar by the members 67 and other parts associated therewith formingthe assembly 66, the said assembly being biased toward the trick bar 14by the tension springs 73, all in the manner and for the purposehereinbefore described.

In lieu of the monitor chains 97-97 operating against the rollers 96-96mounted upon the pivoted members 94 of the movable assembly 93 foreffecting in and out motion of the pick bar toward and away from thetrick bar 14, the rigid frame of the machine at each opposite endthereof has fixedly secured thereto a bracket member having a verticallyextending rail or track portion 126 disposed rcarwardly of the bar 63forming part of the movable assembly 01, which bar 63 is secured to andsupports the pick bar 69 in the arrangement shown in Figures 16 and 17,this bar 63 is of greater length than the bar 63 of the machine as shownin Figures 1 to 6, inclusive, so that its opposite ends extendapproximately to the opposite ends of the main frame of the machine, atwhich ends of the machine are mounted the aforesaid bracket members125-125. The vertically extending track portion 126 of each bracketmember is provided adjacent its lower end with a cam plate 127, theupper edge of which is beveled, as at 128, to provide an inclined camsurface between the adjoining frontal fiat surfaces of the cam plate 127and the track portion 126 extending thereabove.

The bar 63 is fitted with a pair of revoluble rollers 129129respectively alined with and adapted to move along the frontal surfacesof the vertical tracks 126-126 and the offset frontal surfaces of thecam plates 127-- 127. The cam rollers 129129 are respectively biasedinto constant engagement with the vertically extending agents-r offsetcam surfaces just described .by the tension of the springs 73-73.

It will be apparent that upon upward and downward vertical movement ofthe bar 63 under influence of the monitor chains 75-75, the cam rollers129-129 mounted on the bar 63 will alternately move horizontally towardand away from the trick bar as they pass from one to the other of therelatively offset surfaces of the track members 126-126 and the camplates 127-127, the bar 63 being at its innermost position when therollers are engaged with the fiat surface of the tracks 126-126, asshown in Figure 16, and being at its outermost position when the camrollers 129-129 are respectively in engagement with the offset surfacesof the cam plates 127-127.

The point at which the bar 63 and the pick bar 61% associated therewithmoves toward or away from the trick bar may be adjusted as desired bysuitable adjustment of the cam plates 127-127 along the verticallyextending track portions 126-126 of the fixed members 125-125. To thisend, the cam plates 127-127 may each be provided with elongated slotstherein through which project suitable mounting screws 130 for-securingthe cam plates to the members 125-125 in the desired vertically adjustedposition.

Figure 20 illustrates diagrammatically the operation of the machine ofthe modified construction shown in Figures 16 to 19, inclusive, it beingnoted that the picks 61 shift vertically in a plane spaced forwardly ofthe vertical plane of the trick bar to the extent required for theproduction of loops of predetermined uniform length. Assuming that thepicks are in their uppermost position with the top ends thereof at-point1 (see Figure 20) for engagement of the picks by the pile yarn deliveredthereto by the fingers of the pile yarn pillar bar 25, upon furtheroperation of the machine the picks will be lowered under control of themonitor chains 75-75 through the point 2, at the upper level of thetrick bar, to the point 3, at which point the picks'are withdrawn fromthe loops which had been bound into the warp chain stitches at saidupper level of the trick bar. When the loops are so bound into aweft-wise course of the warp chain stitches, the said course of stitcheswith their loops move downwardly below the trick bar level andsimultaneously the picks, which have been withdrawn from said warpwisecourse'of loops, shift horizontally away from the trick bar, that is,from the point 3 to thepoint 4, to clear the picks from the loops fromwhich they have just been withdrawn and so permit the bight ends of theloops to pass downwardly below the upper ends of the picks when thelatter are in their lowermost position. Thereafter the picks shifthorizontally back from the point 4 to the point 3 and thence upwardly topoint l-to reengage the pile yarn to form a succeeding weft-wise courseof loops, following which the cycle of operation just described isrepeated for as many weft-wise courses of looped pile material as isdesired to be produced.

It will be noted that in this modified arrangement the picks do not moveoutwardly from the plane of the trick bar to form loops of desiredlength, but instead move upwardly and downwardly in a substantiallyfixed vertical plane which is spaced from the trick bar the extentnecessary to form loops of the predetermined uniform length. Thus, theloops are formed about, retained y, cam rollers 129-129 are inengagement with. theouter surfaces of the track portions 126-126 of thefixed members 125-125. The pick bar and its associated picks moveoutwardly from the trick bar only when the rollers i29-129 are engagedby and ride upon the outer surfaces of the cam plates 127-127, whichoutward movement is effected only after the picks have been freed fromthe loops when the latter are brought down to the upper level of thetrick bar 14 p r and drawn off the picks during the period that the'spectively over a first pair of said Of course, {it will beapparentthatwarious wdesi-gnszand {effects may be produced by themachine vofzthe modified the use of cams or monitors, as hereinabovedescribed in connection with the machine shown in Figures l to 12..Also, in similar fashion the pick bar may be shiftedweftwise, asdesired, under control of a monitor or'cam, as hereinbefore described. aI

The apparatus of the present invention makes pos- .sible the productionof various designs and effects in the pile surface ofthe fabric. Thus,for example, it will be :appreciated that by eliminating selected picksalong the pick bar, the fabric will be devoid of loops which-would havebeen normally formed by such pick bars and thus the fabric will havewarp-wise extending lines of the loop yarn without, however, any loopspulled out of said yarn to thereby provide in effect a striped design inthe fabric. The warp-wise extending lines so devoid of loops may be of awidth corresponding to-that produced by a single warp-knitted chain orit may be as 'wide as desired, depending upon the number of adjoiningpicks which may have been omitted from the pick bar.

The same general effect could also be obtained by permitting all of thepicks to remain in the pic'k'bar but omitting the ends of loop yarnswhich are normally'do livered to certain selected ones of the picks, inwhich case certain of the warp chains would be completely devoid of anyloop yarn.

Still other variations in design effect are possible by delivering tothe machine pile yarns of different color and/or composition, selectedyarns of a given color'or composition being fed to selected picks of thepickbar.

Of course, all of these dilferent design effects may "be accomplished infabrics wherein the pile is formedfcompletely of uncut loops or wherethe pile is all cut or where the pile is formed of a combination of cutand :uncut loops, and all these various effects may be'ojbtained whetheror not the machine is operated to shift the pick bar laterally, that is,weft-wise of the fabric, through the intervention of the monitor chain119.

It will be understood, of course, that the present 'in- 'vention ashereinbefore described and as shown in the accompanying drawings issusceptible of various changes and modifications which may be made fromtime to time without departing from the general principles or realspirit -of the invention, and accordingly, it is intended to claim thesame broadly, as well as specifically, as indicated by the appendedclaims.

What is claimed as new and useful is:

'1. In a warp knitting machine, the combination comprising a row ofpicks extending weft-wise of the work, monitor means for said picksincluding toothed axially spaced members mounted for rotation about acommon horizontally extending axis, articulated endless link chainsrespectively trained over said revoluble members, the

links of each chain being graduated in depth, and means operativelyinterposed between said monitor'means and picks for mounting andactuating the latter including a pair of laterally spaced elongatedframe supporting members rockable about a horizontal axis and extendingrelink chains in contact therewith, a first rigid frame extending,upright from -said frame supporting members, rockable about ahorizontal axis and spring biased toward said work, and a second uprightrigid frame interposed between said first frame and the work and havingportions respectively overlying a second pair of said link chains incontact therewith, said row of picks being mounted upon said first.frame, said firstpair of chains being operativeifor rocking said framesupporting members thereby to raise and lower said first frame and thepicks carried thereby, and said second pair of chains being operativefor moving said second frame, and through the medium of the latter saidfirst frame, thereby to move said picks horizontally away from said workagainst the influence of said spring bias.

2. In a warp knitting machine, the combination comprising a row of picksextending weft-wise of the work, monitor means for said picks includingtoothed axially spaced members mounted for rotation about a commonhorizontally extending axis, articulated endless link chainsrespectively trained over said revoluble members, the links of eachchain being graduated in depth, means operatively interposed betweensaid monitor means and picks for mounting and actuating the latterincluding a pair of laterally spaced elongated frame supporting membersrockable about a horizontal axis and extending respectively over a firstpair of said link chains in contact therewith, a first rigid frameextending upright from said frame supporting members, rockable about ahorizontal axis and spring biased toward said work, and a second uprightrigid frame interposed between said first frame and the Work and havingportions respectively overlying a second pair of said link chains incontact therewith, said row of picks being mounted upon said firstframe, and means for actuating said monitor means including ahorizontally extending first shaft mounting said toothed revolublemembers, and a main drive shaft parallel and geared to said first shaft,said second frame being rockably mounted upon said main drive shaft,said first pair of chains being operative for rocking said framesupporting members thereby to raise and lower said first frame and thepicks carried thereby, and said second pair of chains being operativefor rocking said second frame, and through the medium of the latterrocking said first frame, thereby to move said picks horizontally awayfrom said work against the influence of said spring bias.

3. In a warp knitting machine, the combination comprising a row of picksextending weft-wise of the work, means mounting the same for movementwarp-wise, normal to the plane, and weft-wise of the work including anupright frame mounted for movement warp-wise and normal to the plane, ofthe work, and secured against movement weft-wise of the work, a pickcarrying member mounted upon said frame for shifting movement relativethereto weft-wise of the work, and means biasing said pick carryingmember in one direction weftwise of the Work, and monitor meansincluding three toothed revoluble members, and three articulated endlesslink chains respectively trained over said revoluble members, the linksof each chain being greater in number than the teeth of the associatedrevoluble member, and being graduated in depth, a pair of said chainsbeing operatively engaged with said frame, and being movable by theassociated ones of said revoluble members to eifectively control themovement of said frame warp-wise and normal to the work, and the thirdone of said chains being operatively engaged with said pick carryingmember and being movable by the associated revoluble member for shiftingsaid pick carrying member weft-wise of the work against the influence ofsaid bias.

4. In a warp knitting machine, the combination comprising a row of picksextending weft-wise of the work, means mounting the same for movementwarp-wise, normal to the plane, and weft-wise of the work including anupright frame secured against movement weft-wise of the work, rockableabout an axis extending weft-wise of the work and mounted for movementwarp-wise of the work, a pick carrying member mounted upon said framefor shifting movement relative thereto weft-wise of the work, and springmeans forbiasing said pick carrying member in one direction weft-wise ofthe work, and monitor means including three toothed revoluble members,and three articulated endless link chains respectively trained over saidrevoluble members, the links of each chain being greater in number thanthe teeth of the associated revoluble member, and being graduated indepth, a pair of said chains being operatively engaged with said frame,and being movable by the associated ones of said revoluble membersrespectively to eifectively control the rocking and the warp-wisemovements of said frame, and the third one of said chains beingoperatively engaged with said pick carrying member, and being movable bythe associated revoluble member for intermittently shifting said pickcarrying member against the influence of said spring bias.

5. In a warp knitting machine, the combination comprising a row of picksextending weft-Wise of the work, monitor means for said picks includingaxially spaced pairs of camming mechanisms mounted for rotation about acommon horizontally extending axis, said camming mechanism eachincluding a series of cam elements of varying depth radially of saidaxis, and means operatively interposed between said monitor means andpicks for mounting and actuating the latter including a pair oflateraily spaced elongated frame supporting members ro'ckable about ahorizontal axis and extending respectively over a first pair of saidcamming mechanisms in contact therewith, a first rigid frame extendingupright from said frame supporting members, rockable about a horizontalaxis and spring biased toward said work, and a second upright rigidframe interposed between said first frame and the work and havingportions respectively overlying a second pair of said camming mechanismsin contact therewith, said row of picks being mounted upon said firstframe, said first pair of camming mechanisms being operative for rockingsaid frame supporting members thereby to raise and lower said firstframe and the picks carried thereby, and said second pair of cammingmechanisms being operative for moving said second frame, and through themedium of the latter said first frame, thereby to move said pickshorizontally away from said Work against the influence of said springbias.

6. In a warp knitting machine, the combination comprising a row of picksextending weft-wise of the work, means mounting the same for movementwarp-wise, normal to the plane, and weft-wise of the work including anupright frame mounted for movement warp-wise and normal to the plane, ofthe work, and secured against movement weft-wise of the work, a pickcarrying member mounted upon said frame for shifting movement relativethereto weft-wise of the work, and means biasing said pick carryingmember in one direction weft-wise of the work, and monitor meansincluding three revoluble camming mechanisms each including a series ofcam elements graduated in depth radially of their axis of rotation, thegraduated cam elements of a pair of said camming mechanisms beingoperatively engaged with said frame, and being movable by the associatedones of said revoluble camming mechanisms to effectively control themovement of said frame warp-wise and normal to the work, and thegraduated cam elements of the third one of said camming mechanisms beingoperatively engaged with said pick carrying member and being movable byits associated revoluble camming mechanism for shifting said pickcarrying member weft-wise of the work against the influence of saidbias.

7. In a warp knitting machine, the combination comprising a row of picksextending weft-wise of the work, means mounting the same for movementwarp-wise, normal to the plane, and weft-wise of the work including anupright frame secured against movement weft-wise of the work, rockableabout an axis extending weft-wise of the work and mounted for movementwarp-wise of the Work, a pick carrying'member mounted upon said framefor shifting movement relative thereto weft-wise of the work, and springmeans for biasing said pick carryinfl member in one direction weft-wiseof the work, and monitor means including three revoluble members eachhaving associated therewith an endless set of cam elements graduated indepth radially of the axis of rotation of the associated revolublemember, the graduated cam elements of a pair of said revoluble membersbeing operatively engaged with said frame, and being movable by theassociated ones of said revoluble members respectively to effectivelycontrol the rocking and the warpwise movements of said frame, and thegraduated cam elements of the third one of said revoluble members 18being operatively engaged with said-pick carrying member, and beingmovable by the associated revoluble member for intermittently shiftingsaid pick carrying member against the influence of said spring bias.

References Cited in the file of this patent UNITED STATES PATENTS MortonQ. Aug. 29, 1933 Amidon Apr. 25, 1939 Lambach Sept. 30, 1947

